'The drugs did for me what I couldn’t do for myself’: A qualitative exploration of the relationship between mental health and amphetamine-type stimulant (ATS) use

Substance use and mental ill health constitute a major public health burden, and a key global policy priority is to reduce illicit and other harmful substance use. Amphetamine-type stimulants (ATS) are the second most used class of illicit drugs and a range of mental health issues have been documented amongst users. This paper explores the relationship between mental health and ATS use, through a thematic analysis of qualitative interviews with n=18 current and former ATS users in England. The findings are presented by trajectory point of; (1) Initiation of ATS use; (2) continued and increased ATS use; and (3) decreased and remitted ATS use. This work helps to develop understanding around the complex and bidirectional relationship between ATS use and mental health. Many ATS users lead chaotic lives and engage in multiple risk behaviours; however, there is a need to better understand and conceptualise the dynamic interaction between different individual, social, environment and cultural factors that determine individuals’ mental health and substance use. There is no ‘one size fits all’ approach to prevention and treatment, and these findings highlight the need for more joined-up, tailored, and holistic approaches to intervention development

A biomolecular archaeological approach to ‘Nordic grog’

The combined archaeological, biomolecular, and archaeobotanical evidence from four sites in Denmark (Nandrup, Kostræde, and Juellinge) and Sweden (Havor on the island of Gotland) provide key reference points for reconstructing ‘Nordic grog’ from ca. 1500 BC to the first century AD. In general, Nordic peoples preferred a hybrid beverage or ‘grog,’ in which many ingredients were fermented together, including locally available honey, local fruit (e.g., bog cranberry, and lingonberry) and cereals (wheat, rye, and/or barley), and sometimes grape wine imported from farther south in Europe. Local herbs/spices, such as bog myrtle, yarrow and juniper, and birch tree resin rounded out the concoction and provide the earliest chemical attestations for their use in Nordic fermented beverages. The aggregate ingredients probably served medicinal purposes, as well as contributing special flavors and aromas. They continued to be important ingredients for many kinds of beverages throughout medieval times and up to the present. The importation of grape wine from southern or central Europe as early as ca. 1100 BC, again chemically attested here for the first time, is of considerable cultural significance. It demonstrates the social and ceremonial prestige attached to wine, especially when it was served up as ‘Nordic grog’ in special wine-sets imported from the south. It also points to an active trading network across Europe as early as the Bronze Age in which amber might have been the principle good exchanged for wine. The presence of pine resin in the beverages likely derives from the imported wine, added as a preservative for its long journey northward

Summary Report on 2018 Residue Monitoring of Irish Farmed Finfish & 2018 Border Inspection Post Fishery Product Testing undertaken at the Marine Institute

On behalf of the Department of Agriculture, Food and Marine (DAFM), the Marine Institute carries out monitoring of chemical residues in finfish for aquaculture sector. This monitoring is set out in the annual National Residue Control Plan, which is approved by the European Commission, and is an important component of the DAFM food safety controls and is implemented under a service contract with the Food Safety Authority of Ireland. Since 1999, the Marine Institute has implemented the National Residues Monitoring Programme for aquaculture. This is carried out on behalf of the Sea Fisheries Protection Authority, which is the responsible organisation for residue controls on farmed finfish. In 2018, in excess of 920 tests and a total of 2,611 measurements were carried out on 171 samples of farmed finfish for a range of residues. Implementation of the Aquaculture 2018 Plan involves taking samples at both farm and processing plant: • 123 target samples taken at harvest: 110 farmed salmon and 13 freshwater trout. • 48 target samples were taken at other stages of production: 40 salmon smolts and 8 freshwater trout. All 2018 samples were compliant. For target sampling of farmed fish, a summary table of the residue results from 2005 - 2018 is outlined in Table 1. Overall, the outcome for aquaculture remains one of consistently low occurrence of residues in farmed finfish, with no non-compliant target residues results for the period 2006-2014, 0.11% and 0.10% non-compliant target residues results in 2015 and 2016 respectively and no non-compliant target results in 2017 and 2018

Surface Gravities for 228 M, L, and T Dwarfs in the NIRSPEC Brown Dwarf Spectroscopic Survey

We combine 131 new medium-resolution (R~2000) J-band spectra of M, L, and T dwarfs from the Keck NIRSPEC Brown Dwarf Spectroscopic Survey (BDSS) with 97 previously published BDSS spectra to study surface-gravity-sensitive indices for 228 low-mass stars and brown dwarfs spanning spectral types M5-T9. Specifically, we use an established set of spectral indices to determine surface gravity classifications for all M6-L7 objects in our sample by measuring equivalent widths (EW) of the K I lines at 1.1692, 1.1778, 1.2529 um, and the 1.2 um FeHJ absorption index. Our results are consistent with previous surface gravity measurements, showing a distinct double peak - at ~L5 and T5 - in K I EW as a function of spectral type. We analyze K I EWs of 73 objects of known ages and find a linear trend between log(Age) and EW. From this relationship, we assign age ranges to the very low gravity, intermediate gravity, and field gravity designations for spectral types M6-L0. Interestingly, the ages probed by these designations remain broad, change with spectral type, and depend on the gravity sensitive index used. Gravity designations are useful indicators of the possibility of youth, but current datasets cannot be used to provide a precise age estimate.Comment: 33 pages, 13 figures, ApJ in pres

The NIRSPEC Brown Dwarf Spectroscopic Survey. I. Low-Resolution Near-Infrared Spectra

We present the first results of a near-infrared (0.96-2.31 micron) spectroscopic survey of M, L, and T dwarfs obtained with NIRSPEC on the Keck II telescope. Our new survey has a resolving power of R = 2000 and is comprised of two major data sets: 53 J-band (1.14-1.36 micron) spectra covering all spectral types from M6 to T8 with at least two members in each spectral subclass (wherever possible), and 25 flux-calibrated spectra from 1.14 to 2.31 microns for most spectral classes between M6 and T8. Sixteen of these 25 objects have additional spectral coverage from 0.96-1.14 microns to provide overlap with optical spectra. Spectral flux ratio indexes for prominent molecular bands are derived and equivalent widths (EWs) for several atomic lines are measured. We find that a combination of four H2O and two CH4 band strengths can be used for spectral classification. Weak (EW~1-2 angstrom) atomic lines of Al I and Ca I disappear at the boundary between M and L types.Comment: 60 pages, 25 figures. To appear in the Astrophysical Journal Vol 596. Received 2003 March 31; accepted 2003 June 20. Web site at http://www.astro.ucla.edu/~mclean/BDSSarchiv

Discovery of a Very Young Field L Dwarf, 2MASS J01415823-4633574

While following up L dwarf candidates selected photometrically from the Two Micron All Sky Survey, we uncovered an unusual object designated 2MASS J01415823-4633574. Its optical spectrum exhibits very strong bands of vanadium oxide but abnormally weak absorptions by titanium oxide, potassium, and sodium. Morphologically such spectroscopic characteristics fall intermediate between old, field early-L dwarfs (log(g)~5) and very late M giants (log(g)~0), leading us to favor low gravity as the explanation for the unique spectral signatures of this L dwarf. Such a low gravity can be explained only if this L dwarf is much lower in mass than a typical old field L dwarf of similar temperature and is still contracting to its final radius. These conditions imply a very young age. Further evidence of youth is found in the near-infrared spectrum, including a triangular-shaped H-band continuum reminiscent of young brown dwarf candidates discovered in the Orion Nebula Cluster. Using the above information along with comparisons to brown dwarf atmospheric and interior models, our current best estimate is that this L dwarf has an age of 1-50 Myr and a mass of 6-25 M_Jupiter. The location of 2MASS 0141-4633 on the sky coupled with a distance estimate of ~35 pc and the above age estimate suggests that this object may be a brown dwarf member of either the 30-Myr-old Tucana/Horologium Association or the ~12-Myr-old beta Pic Moving Group.Comment: Accepted for publication in the 10 March 2006 issue (volume 639) of the Astrophysical Journa

“They had clothes on their back and they had food in their stomach, but they didn\u27t have me”: The contribution of parental mental health problems, substance use, and domestic violence and abuse on young people and parents

\ua9 2024 The AuthorsBackground: The parental risk factors of mental health problems, substance use, and domestic violence and abuse each individually negatively impacts children\u27s health and developmental outcomes. Few studies have considered the lived experience and support needs of parents and children in the real-world situation where these common risks cluster. Objective: This study explores parents\u27 and young people\u27s lived experiences of the clustering of parental mental health problems, parental substance use, and domestic violence and abuse. Methods: Semi-structured interviews were conducted with 18 mothers, 6 fathers, and 7 young people with experiences of these parental risk factors. Transcribed interviews were analysed using reflexive thematic analysis. Results: Four themes were developed, 1) cumulative adversity, 2) the impact of syndemic risk, 3) families navigating risk, and 4) family support. Parents and young people described family situations of stress wherein they experienced cumulative impact of multiple parental risk factors. Parents sought to navigate stressors and parent in positive ways under challenging conditions, often impeded by their own childhood trauma and diminished confidence. Parents and young people spoke of the need for, and benefits of having, support; both as a family and as individuals, to successfully address this trio of parental risks and the related impact. Conclusions: This study highlights the high level of stress families experience and the efforts they go to mitigate risk. Services and interventions need to reflect the complexity of multiple needs and consider both the whole family and individuals when providing support

Guidelines for the Assessment of Dredge Material for Disposal in Irish Waters

Prior to the present guidelines the assessment, by the Marine Institute on behalf of the Department of Communication, Marine and Natural Resources, of the suitability of dredged materials for disposal at sea had employed provisional action levels as an aid to evaluation. These provisional action levels were based entirely on sediment chemistry. The responsible agencies have decided that these levels now need to be updated and formalised. The approach proposed in this document aims to provide an improved, and more integrated, assessment of the ecological risks associated with individual sediment dredging and disposal activities. It offers flexibility to deal with issues on a case-by-case basis and improves transparency of the decision-making process. The list of parameters to be assessed has been revised and methods for setting numerical guidance values in other countries have been reviewed. Ideally, guidance levels should comprise chemical and ecotoxicological data specifically relating to Irish sediments. In the absence of a comprehensive dataset for Irish sediments, proposed threshold guidance levels have been based on ecotoxicological data from other sources. Wherever possible, lower threshold guidance values have been based on existing Irish background levels of contaminants. Where background data do not exist for a particular parameter, ecotoxicologically-derived values, corresponding to expected no-effect levels, have been taken from reputable sources. Similarly, upper threshold guidance levels (i.e. levels at which effects may be expected) have been based on ecotoxicological data from reputable sources. The assessment strategy has been designed so that decisions concerning the acceptability of sediments for sea disposal will take into account a range of intrinsic and environmental factors i.e. the strategy adopts a Weight of Evidence approach. The guidance will be reviewed and revised as necessary, as more information becomes available. Sampling and storage methodology is presented as well as quality assurance and reporting requirements. Guidance on analytical procedures and approval of analytical laboratories is included.Funder: Marine Institut

A new window on Strange Quark Matter as the ground state of strongly interacting matter

If strange quark matter is the true ground state of matter, it must have lower energy than nuclear matter. Simultaneously, two-flavour quark matter must have higher energy than nuclear matter, for otherwise the latter would convert to the former. We show, using an effective chiral lagrangian, that the existence of a new lower energy ground state for two-flavour quark matter, the pion condensate, shrinks the window for strange quark matter to be the ground state of matter and sets new limits on the current strange quark mass